The Castelli Bolero Long Sleeve is designed to be worn under the Body Paint 4.X Speed Suit to maximise your aerodynamics for TT, though it will convey aero gains when paired with any speed suit or aero jersey.The secret is the ribs on the sleeves, which create aerodynamic trip strips that disrupt the air flow as you race, making Castelli's fastest garments even faster. Pull yours on when it's time to set a new PB– that’s what the pros do.Features:A long sleeve bolero with a race fitDesigned expressly for wear with the Body Paint 4.X Speed SuitIt will deliver aero gains when worn with any speed suit or aero jerseySleeves feature aero trip ribbing, for maximum aero gainWeighs 60g (M)